{"id":507,"date":"2026-09-22T08:53:56","date_gmt":"2026-09-22T08:53:56","guid":{"rendered":"https:\/\/singaporepetcare.improvepetcare.com\/?p=507"},"modified":"2026-09-22T08:54:49","modified_gmt":"2026-09-22T08:54:49","slug":"heartworm-disease-in-cats-symptoms-causes-treatment","status":"publish","type":"post","link":"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/","title":{"rendered":"Heartworm Disease in Cats \u2013 Symptoms, Causes &#038; Treatment \u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Heartworm disease in cats is a serious but often overlooked condition that can affect both indoor and outdoor cats. A single mosquito bite can lead to subtle symptoms and in severe cases, it can cause serious breathing problems or sudden collapse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this blog post, we will cover everything you need to know about heartworm disease in cats, including the symptoms, causes, and practical tips for prevention and treatment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s get started!<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#What_are_heartworms\" >What are heartworms?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#How_do_heartworms_infect_cats\" >How do heartworms infect cats?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#How_common_is_heartworm_in_cats\" >How common is heartworm in cats?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#What_are_the_first_signs_of_heartworms_in_cats\" >What are the first signs of heartworms in cats?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#How_to_treat_heartworms_in_cats\" >How to treat heartworms in cats?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#Simple_tips_for_heartworm_prevention_in_cats\" >Simple tips for heartworm prevention in cats<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/singaporepetcare.improvepetcare.com\/heartworm-disease-in-cats-symptoms-causes-treatment\/#Wrapping_Up\" >Wrapping Up<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_heartworms\"><\/span><strong>What are heartworms?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Heartworms are large, spaghetti-like worms that grow up to a foot long and live in the heart, associated blood vessels and lungs for several years. Adult heartworms reproduce in their natural hosts (primarily dogs). Cats are an atypical host and usually do not have circulating microfilariae and adult heartworms rarely reproduce in cats. Heartworms can cause serious damage to the heart, lungs and other organs if left untreated.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_do_heartworms_infect_cats\"><\/span><strong>How do heartworms infect cats?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Heartworms are transmitted when an infected mosquito bites a cat and transfers infective heartworm larvae (L3) into the cat\u2019s bloodstream. The larvae migrate through the cat\u2019s tissues over several months before reaching the blood vessels of the lungs and, in some cases, the heart. Even a small number of worms can cause significant inflammation and damage, leading to heartworm disease.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_common_is_heartworm_in_cats\"><\/span><strong>How common is heartworm in cats?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Heartworm disease in cats is less common than in dogs, but it is not rare. Cats can also become infected through the bite of an infected mosquito. Overall, the risk varies by region and outdoor exposure and feline heartworm disease may be underdiagnosed because some cats don\u2019t show any symptoms and don\u2019t develop infections detectable by standard tests.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_the_first_signs_of_heartworms_in_cats\"><\/span><strong>What are the first signs of heartworms in cats<\/strong><strong>?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Take a look at the initial signs of heartworms in cats:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coughing or difficulty breathing<\/li>\n\n\n\n<li>Exercise intolerance<\/li>\n\n\n\n<li>Rapid breathing<\/li>\n\n\n\n<li>Reduced activity \u00a0<\/li>\n\n\n\n<li>Weakness or lethargy<\/li>\n\n\n\n<li>Vomiting<\/li>\n\n\n\n<li>Loss of appetite<\/li>\n\n\n\n<li>Diarrhoea<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_treat_heartworms_in_cats\"><\/span><strong>How to treat heartworms in cats?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The treatment of heartworm disease in cats is difficult and mostly supportive rather than curative since there is no approved drug to eliminate adult heartworms in cats and killing the worms can trigger severe reactions. Veterinarians typically focus on rest, corticosteroids to reduce inflammation, and other supportive care such as oxygen therapy or IV fluids if the cat has breathing trouble. In rare, severe cases, surgical removal of worms may be considered. Therefore, preventing the disease in the first place is the best way to keep your cat protected.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Simple_tips_for_heartworm_prevention_in_cats\"><\/span><strong>Simple tips for heartworm prevention in cats<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keep track of the symptoms and seek veterinary help if you notice anything unusual.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limit outdoor exposure during peak mosquito hours (especially at dusk and dawn).<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Maintain hygiene to prevent mosquito breeding by removing standing water, mowing the lawn and keeping your surroundings clean.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Avoid using mosquito repellents on cats unless they are labelled as safe for cats. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Administer year-round heartworm preventive treatments to keep your cat protected. Consider treatments based on your cat\u2019s age, weight and lifestyle for the best results.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Schedule routine vet visits for early detection and timely treatment.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wrapping_Up\"><\/span><strong>Wrapping Up<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Although heartworm disease is less common in cats, it can still affect them and cause life-threatening damage. However, with the right knowledge and preventive care, you can help protect your cat from this serious disease. So, learn about heartworms in cats with this blog and keep your feline friend safe and healthy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-vivid-red-background-color has-background wp-element-button\" href=\"https:\/\/www.singaporepetcare.com.sg\/blog\/understanding-heartworm-disease-in-cats-facts-and-how-to-keep-your-cat-safe\/\">Understanding Heartworm Disease in Cats<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Heartworm disease in cats is a serious but often overlooked condition that can affect both&hellip;<\/p>\n","protected":false},"author":1,"featured_media":508,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[261,262,263],"class_list":["post-507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cats","tag-heartworm-prevention-for-cats","tag-how-common-is-heartworm-in-cats","tag-what-are-the-first-signs-of-heartworms-in-cats"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Heartworm Disease in Cats \u2013 Symptoms, Causes &amp; 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